"""Search for lines > 80 chars or with trailing whitespace."""

import sys, os

def main():
  args = sys.argv[1:] or os.curdir
  for arg in args:
    if os.path.isdir(arg):
      for dn, dirs, files in os.walk(arg):
        for fn in sorted(files):
          if fn.endswith('.py'):
            process(os.path.join(dn, fn))
        dirs[:] = [d for d in dirs if d[0] != '.']
        dirs.sort()
    else:
      process(arg)

def isascii(x):
  try:
    x.encode('ascii')
    return True
  except UnicodeError:
    return False

def process(fn):
  try:
    f = open(fn)
  except IOError, err:
    print err
    return
  try:
    for i, line in enumerate(f):
      line = line.rstrip('\n')
      sline = line.rstrip()
      if len(line) > 80 or line != sline or not isascii(line):
        print '%s:%d:%s%s' % (fn, i+1, sline, '_' * (len(line) - len(sline)))
  finally:
    f.close()

main()
